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volt mod for a 3870

post #1 of 7
Thread Starter 
how do I do it with a diamond 3870? no resistor for r1222 so I'm not sure how to change the voltage here and I'm hoping to get more then the 904 core speed I have now.
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compy jr
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post #2 of 7
http://www.overclock.net/software-ne...or-0-96-a.html

Hope this helps.
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Lee XT
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post #3 of 7
Licht that doesn't work for the 3870's b/c they already default when under load to the highest flashable voltage.

http://forums.techpowerup.com/showthread.php?t=48544

thats what you need and a 2B pencil works.

*edit* it says it supports up to 1.4v Hmmmmmm interesting.
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post #4 of 7
Thread Starter 
NCspecv81 I would like to do that mod you posted about but there is one catch that is really screwing me up. the r1222 resistor talked about I don't have. all that is there is just two solder joints.

btw this was said in the first post


licht I tried that bios editor but it still seems to only give me 1.33v to the core at least when I measured on the big prongs that another place I saw was saying to measure at. doesn't matter that I tell that thing to give me 1.4v either


EDIT: well I had version .95 didn't notice this was version .96. one other thing though is when I was confusing this with another program. this one would only allow up to 1.327 but there is another bios editor RBE by techpowerup that allowed you to manually enter the voltage instead of a drop down. that is the one that didn't work even though I put in 1.4v

will try this an report back either way rep to both.
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compy jr
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post #5 of 7
there is an alternate point you can use to pencil in btw.
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post #6 of 7
Found it courtesy of Rumon on xtremesystems

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post #7 of 7
Thread Starter 
well I have some news at least



bad news though is it is a pain to adjust right. first time I hit 1.5x volts.
good news though is it looks like I can hit around 950ish or so and it seems to only hit around high 60's low 70's on the stock cooler. just need a little more and I hopefully can hit 1ghz on the stock cooler but I'm afraid I'm close to tapped with it.

but yeah that original one just doesn't work I had to do the yellow volt mod for it to work.

and please pardon the mess. one too many hard drives and I'm horrible with wiring and still trying to figure out how to route them all.


EDIT:looks like my mistake I was only hitting 70 under load using atitool. bumped it up to 1.43ish see how it goes from there.
compy jr
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compy jr
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